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<p>What command would I use to convert an mp4 or mv4 video file to an animated gif, and vice versa.  That is, convert a animated gif to a mp4 or mv4.</p>
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<p>Here's what worked for me:</p>

<pre><code>ffmpeg -i animated.gif -movflags faststart -pix_fmt yuv420p -vf "scale=trunc(iw/2)*2:trunc(ih/2)*2" video.mp4
</code></pre>

<p><strong>movflags</strong> – This option optimizes the structure of the MP4 file so the browser can load it as quickly as possible.</p>

<p><strong>pix_fmt</strong> – MP4 videos store pixels in different formats. We include this option to specify a specific format which has maximum compatibility across all browsers.</p>

<p><strong>vf</strong> – MP4 videos using H.264 need to have a dimensions that are divisible by 2. This option ensures that’s the case.</p>

<p>Source: <a href="http://rigor.com/blog/2015/12/optimizing-animated-gifs-with-html5-video">http://rigor.com/blog/2015/12/optimizing-animated-gifs-with-html5-video</a></p>
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                <span class="comment-copy">Thanks this is the only version that worked for me on osx.</span>
                
&ndash;&nbsp;<a href="/users/68971/pykler"
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                <span class="comment-date" dir="ltr"><span title="2016-07-14 23:52:43Z, License: CC BY-SA 3.0" class="relativetime-clean">Jul 14 '16 at 23:52</span></span>
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                <span class="comment-copy">This worked for me on Ubuntu 16.10 with ffmpeg 3.0.2, where the top answer didn&#39;t</span>
                
&ndash;&nbsp;<a href="/users/136107/cat"
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                <span class="comment-copy">May as well crop instead of scaling (replace <code>scale</code> with <code>crop</code>), as you&#39;re only going to be cutting off at most 1 pixel. Scaling might make things blurry</span>
                
&ndash;&nbsp;<a href="/users/216445/jezzamon"
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                <span class="comment-date" dir="ltr"><span title="2018-02-01 08:12:17Z, License: CC BY-SA 3.0" class="relativetime-clean">Feb 1 '18 at 8:12</span></span>
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                <span class="comment-copy">This cut off the last few seconds for me. Resulting mp4 ended early.</span>
                
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<p>In my case, using <code>ffmpeg</code> directly did the trick and provided the best result:</p>

<pre><code>$ ffmpeg -f gif -i infile.gif outfile.mp4
</code></pre>
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                <span class="comment-copy">produced a blank (corrupted) video on os x</span>
                
&ndash;&nbsp;<a href="/users/68971/pykler"
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                <span class="comment-date" dir="ltr"><span title="2016-07-14 23:53:03Z, License: CC BY-SA 3.0" class="relativetime-clean">Jul 14 '16 at 23:53</span></span>
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                <span class="comment-copy">@Pykler you should probably increase verbosity and/or check the log file to understand what&#39;s happening.</span>
                
&ndash;&nbsp;<a href="/users/37633/benc"
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                <span class="comment-date" dir="ltr"><span title="2016-07-17 19:02:40Z, License: CC BY-SA 3.0" class="relativetime-clean">Jul 17 '16 at 19:02</span></span>
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                <span class="comment-copy">Me too, probably the &quot;divisible by 2 dimensions&quot; suggested in vico Vault&#39;s answer. (which worked for me)</span>
                
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                <span class="comment-date" dir="ltr"><span title="2016-10-24 11:20:42Z, License: CC BY-SA 3.0" class="relativetime-clean">Oct 24 '16 at 11:20</span></span>
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                <span class="comment-copy">This method worked perfectly for me. (The top answer caused 3 seconds to be cut off the end.) EDIT: oh but it doesn&#39;t play on iOS :(</span>
                
&ndash;&nbsp;<a href="/users/180156/callum"
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                <span class="comment-date" dir="ltr"><span title="2018-02-22 13:07:38Z, License: CC BY-SA 3.0" class="relativetime-clean">Feb 22 '18 at 13:07</span></span>
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                <span class="comment-copy">A <a href="https://apple.stackexchange.com/questions/166553/why-wont-video-from-ffmpeg-show-in-quicktime-imovie-or-quick-preview">web page</a> says you should just add -pix_fmt yuv420p</span>
                
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                <span class="comment-date" dir="ltr"><span title="2018-08-20 16:06:33Z, License: CC BY-SA 4.0" class="relativetime-clean">Aug 20 '18 at 16:06</span></span>
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<p>If you want to make the output in <strong>"n loops"</strong>, look at this solution in one  shot</p>

<p>So, let's convert a <strong>normal.gif</strong> to <strong>loop.mp4</strong></p>

<blockquote>
  <p>for <strong>2 loops</strong> movie example:</p>
</blockquote>

<pre><code>ffmpeg -stream_loop 2 -i normal.gif loop.gif -y;ffmpeg -i loop.gif -pix_fmt yuv420p -vf "scale=trunc(iw/2)*2:trunc(ih/2)*2" loop.mp4 -y
</code></pre>

<blockquote>
  <p>for <strong>5 loops</strong> movie example:</p>
</blockquote>

<pre><code>ffmpeg -stream_loop 5 -i my.gif loop.gif -y;ffmpeg -i loop.gif -pix_fmt yuv420p -vf "scale=trunc(iw/2)*2:trunc(ih/2)*2" loop.mp4 -y
</code></pre>

<blockquote>
  <p><strong>be aware:</strong> There's a <strong>-y option</strong>, so the output files will be overwritten</p>
  
  <p>the <strong>-vf option</strong> is to resolve the <em>ratio proportionality</em> [width vs height]</p>
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                <span class="comment-copy">If you run the first <code>ffmpeg</code> command <b>without</b> <code>-y</code>, you&#39;ll have much less chance of accidentally overwriting something you don&#39;t want to. (There&#39;s also <i>probably</i> a way to get <code>ffmpeg</code> to pipe video into itself, and do this in one piped command without the intermediate file and the overwrite.)</span>
                
&ndash;&nbsp;<a href="/users/42315/ferd"
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<p>MacOs version is as following:</p>

<pre><code>$ ffmpeg -i input.avi -pix_fmt yuv420p output.mp4
</code></pre>

<h3>References</h3>

<ul>
<li><a href="https://apple.stackexchange.com/a/166554">Why won't video from ffmpeg show in QuickTime, iMovie or quick preview?
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                <span class="comment-copy">Not just Apple, but also Windows media player sometimes can&#39;t play the output if you don&#39;t specify that option. And if you try playing it with other players, it would be a comeple gray screen with artifacts showing on video.</span>
                
&ndash;&nbsp;<a href="/users/273587/shayan"
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                <span class="comment-date" dir="ltr"><span title="2019-12-01 13:28:21Z, License: CC BY-SA 4.0" class="relativetime-clean">Dec 1 '19 at 13:28</span></span>
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                <span class="comment-copy">I get <code>height not divisible by 2 (260x373)</code> and <code>Error initializing output stream 0:0 -- Error while opening encoder for output stream #0:0 - maybe incorrect parameters such as bit_rate, rate, width or height</code> error message. But <a href="https://unix.stackexchange.com/a/294892/64403">this answer</a> works for me.</span>
                
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<p>Another way to convert GIF animation to video:</p>

<pre><code>ffmpeg -i your_gif.gif -c:v libvpx -crf 12 -b:v 500K output.mp4
</code></pre>

<p>-crf values can go from 4 to 63. Lower values mean better quality.
-b:v is the maximum allowed bitrate. Higher means better quality.</p>
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